JP4771132B2 - Liquid heating device - Google Patents

Description

  The present invention relates to a liquid heating apparatus, and more particularly to an apparatus having a feature in a method for performing a water supply operation for heating and supplying water to the outside.

Conventionally, a liquid heating apparatus as disclosed in Patent Document 1 below has been provided. Many of the liquid heating apparatuses of this type include a storage unit that can store liquid such as hot water or a heat medium, and a heating unit that can heat the liquid in the storage unit, and the liquid stored in the storage unit. It is set as the structure which can supply thermal energy to load terminals, such as a heating apparatus, via the. Further, in the conventional liquid heating apparatus as described above, a heat exchanger for heating clean water is disposed in the storage means, and is supplied to the heat exchanger by heat exchange with the liquid in the storage means. It is configured to be able to heat and supply clean water.
JP 2001-235231 A

  In the liquid heating apparatus as disclosed in Patent Document 1, the volume of the storage means increases or the height of the storage means increases because the heat exchanger must be disposed in the storage means. There's a problem. Therefore, the liquid heating device of the prior art has a problem that the device configuration becomes large.

  Therefore, the present inventors can heat-heat the water by providing a heat exchanger for heating the clean water outside the storage means and supplying the liquid in the storage means to the heat exchanger by a pump. A liquid heating apparatus having a simple structure was produced and tested. As a result, it has been found that the capacity and height of the storage means can be suppressed. However, if it is necessary to heat and supply the clean water while the liquid in the storage means is at a low temperature, the clean water is heated to a predetermined temperature even if it is supplied to the heat exchanger by operating the pump. Not only can the liquid in the low temperature state be dissipated in the heat exchanger, but the time required for the liquid in the storage means to reach an appropriate temperature for heating the water is further increased, and energy efficiency is reduced. It turns out that there is a risk of it. Therefore, when configured as described above, depending on the temperature condition of the liquid in the storage means, the time lag until the temperature of the clean water reaches a predetermined temperature after the start of the clean water supply operation is increased, There was a problem of energy loss.

  Based on such knowledge, the present invention is a case where the water supply operation is performed under a condition where the liquid in the storage means is at a low temperature while the heat exchange means for heating the clean water is arranged outside the storage means. Another object of the present invention is to provide a liquid heating apparatus that has a short time lag from the start of the water supply operation until the temperature of the water reaches a predetermined temperature, and has little energy loss.

  The invention according to claim 1, which is provided to solve the above-described problem, has a housing and can store the liquid in the housing from below, above or from the side of the storing device. A heating means capable of heating the liquid in the means, a heat exchange means, a primary flow path capable of supplying the liquid stored in the storage means to the heat exchange means, and a secondary flow through which clean water can circulate A passage, a pumping unit capable of pumping liquid between the storage unit and the heat exchange unit, and a temperature detection unit capable of directly or indirectly detecting the temperature of the liquid stored in the storage unit. The heat exchange means is disposed at a position spaced downward with respect to the storage means, and supplying the clean water through a secondary flow path, the clean water is supplied to the primary water. Heat exchange with the liquid supplied from the storage means through the flow path Then, it is possible to carry out a water supply operation for supplying to the outside of the heating system, and at a timing of performing the water supply operation, the temperature detected by the temperature detecting means is less than a first predetermined temperature. As a condition, the liquid heating apparatus is characterized in that the start-up of the pressure feeding means is delayed until the temperature detected by the temperature detection means becomes equal to or higher than the first predetermined temperature, or the liquid pressure feeding capability of the pressure feeding means is limited.

  In the liquid heating apparatus of the present invention, the start of the pressure feeding means is delayed on the condition that the liquid in the storage means is lower than the first predetermined temperature at the timing when the water supply operation is to be performed, or the liquid pressure feeding of the pressure feeding means is performed. The capacity is limited, and in this state, the liquid is configured to wait for the liquid to reach a first predetermined temperature or higher. Therefore, in the liquid heating apparatus of the present invention, when the liquid in the storage means is lower than the first predetermined temperature, the supply of the liquid to the heat exchange means is blocked or restricted, and the liquid radiates heat by the heat exchange means. The occurrence of energy loss such as can be suppressed. Therefore, in the liquid heating device of the present invention, even if the liquid stored in the storage means is at a low temperature, it can be heated up quickly. Therefore, according to the present invention, the water supply operation is started when the water supply operation is to be performed under the condition that the liquid stored in the storage means is equal to or lower than the first predetermined temperature. It is possible to provide a liquid heating apparatus capable of minimizing a time lag and energy loss until the clean water reaches a predetermined temperature.

  In the liquid heating apparatus of the present invention, the heat exchanging means for heating the clean water is disposed at a position separated from the storing means, so that the capacity and height of the storing means can be suppressed. Therefore, according to the present invention, a liquid heating apparatus having a compact apparatus configuration can be provided.

  Further, the liquid heating apparatus of the present invention is configured to circulate the liquid stored in the storage unit between the storage unit and the heat exchange unit, and to heat the clean water by heat exchange with the liquid. . Therefore, according to the liquid heating device of the present invention, clean water can be efficiently heated and supplied to the outside of the heating system.

  Further, since the liquid heating apparatus of the present invention is configured to circulate the liquid stored in the storage unit between the storage unit and the heat exchange unit, the liquid used for heating the clean water in the heat exchange unit is stored in the storage unit. Part of the liquid stored in the means. For this reason, in the liquid heating apparatus of the present invention, the temperature of the clean water supplied to the outside of the heating system can be stabilized almost without being influenced by the temperature unevenness of the liquid stored in the storage means.

  Furthermore, in the liquid heating apparatus of the present invention, the clean water can be heated to a desired temperature if the liquid supplied to the heat exchange means has reached a predetermined temperature. Therefore, the liquid heating apparatus of the present invention can heat the clean water to a desired temperature without waiting for the entire liquid in the storage means to reach a predetermined temperature. Therefore, the liquid heating apparatus of the present invention has a short time (rise time) required for the clean water supplied to the outside of the heating system to reach a desired temperature after the start of the clean water supply operation.

  Here, in the liquid heating apparatus of the present invention, since the heating unit can heat the liquid in the storage unit from below, above or from the side of the storage unit, the liquid in the storage unit is operated by operating the heating unit. When heated, the liquid convects in the storage means, and the liquid on the upper side of the storage means tends to be hotter than the liquid on the lower side. Therefore, in the liquid heating apparatus of the present invention, when the heat exchanging means provided for heating the clean water is disposed at a height equivalent to or higher than the storage means, the upper side of the storage means Thermal energy may be transmitted to the heat exchange means via the primary flow path or the like. If such a situation occurs when the supply of clean water is stopped, the clean water staying in the heat exchanging means will be heated, and immediately after the start of the supply of the next clean water, There is a possibility of being supplied (discharged) to the outside.

  Therefore, based on such knowledge, in the liquid heating apparatus of the present invention, the heat exchange means is disposed below the storage means, and heat transfer from the storage means to the heat exchange means is minimized. Therefore, in the liquid heating apparatus of the present invention, when the supply of clean water is stopped, the clean water staying in the heat exchange means is heated more than necessary, or high temperature clean water is supplied immediately after the start of the supply of the next clean water. It is difficult to cause problems such as

  Here, when the temperature of the liquid supplied from the storage means to the heat exchange means is low as described above, the water energy that the liquid has is supplied to the heat exchange means via the secondary flow path. The water is not so hot. Therefore, when the temperature of the liquid is low, the inflow of the liquid to the heat exchanging means by delaying the start timing of the pumping means or limiting the liquid pumping ability as in the liquid heating apparatus according to claim 1. It is desirable to limit the amount.

  On the other hand, if the interval between the start timing of the water supply operation and the timing of starting the pumping means or releasing the restriction of the liquid pumping capability becomes long, the tap water is heated to a predetermined set temperature. There is a possibility that the time lag until it can be supplied in a state becomes large.

  Therefore, the invention according to claim 2 provided to cope with such a problem is supplied to the heat exchanging means via the secondary flow path when the temperature detected by the temperature detecting means is equal to or higher than the second predetermined temperature. Assuming that the flow rate of clean water is the reference flow rate, the temperature detection means detects that the detected temperature is equal to or higher than the first predetermined temperature and lower than the second predetermined temperature. The liquid heating apparatus according to claim 1, wherein the flow rate of clean water supplied to the heat exchange means is limited to a smaller amount than the reference flow rate.

  In the present invention, the second predetermined temperature is higher than the first predetermined temperature. Therefore, when the temperature of the liquid stored in the storage unit is equal to or higher than the second predetermined temperature, it is assumed that the heating capacity of the clean water in the heat exchange unit is higher than the case where the temperature is lower than this.

  As described above, in the liquid heating apparatus of the present invention, the amount of clean water supplied to the heat exchange means when the temperature of the liquid is equal to or higher than the first predetermined temperature and lower than the second predetermined temperature is the temperature of the liquid. It is set as the structure adjusted so that it may become a small quantity rather than the case where it is more than 2 predetermined temperature. Therefore, in the liquid heating apparatus of the present invention, even if the temperature of the liquid does not wait until it reaches the second predetermined temperature, the water is heated to the set temperature or an acceptable temperature if the temperature is equal to or higher than the first predetermined temperature. can do. Therefore, according to the present invention, even when the temperature of the liquid in the storage means at the start timing of the water supply operation is low, the water is heated to the predetermined set temperature from the start timing of the water supply operation. The time lag (rise time) until it can be supplied with the power can be minimized.

  Here, as described above, when the liquid stored in the storage unit is heated, the liquid existing on the upper side of the storage unit tends to be preferentially heated with respect to the liquid existing on the lower side. Therefore, in the liquid heating apparatus according to claim 1 or 2, the liquid existing on the upper side of the storage means can be preferentially taken out with respect to the liquid existing on the lower side and supplied to the heat exchange means. Desirable (Claim 3).

  According to this configuration, the liquid heated to a high temperature in the storage unit can be preferentially supplied to the heat exchange unit. Therefore, according to the liquid heating apparatus of the present invention, while effectively using thermal energy, the time (rise time) required from the start of supply of clean water to the supply of clean water heated to a predetermined temperature is increased. Further shortening is possible.

  Here, in the above-described liquid heating apparatus, a configuration is adopted in which the liquid is taken out from the storage means via the primary flow path and is supplied to the heat exchange means. Depending on the conditions, the middle of the primary flow path, the heat exchange means, etc. There is a possibility that the heat supply temperature will fluctuate somewhat due to heat dissipation.

  Therefore, when such a situation is assumed, the liquid heating device according to any one of claims 1 to 3 is supplied from the outside of the heating system and the clean water heated in the heat exchange means and flowing in the secondary flow path. In addition, it is desirable that the mixing means for mixing the clean water and the flow rate adjusting means capable of adjusting the flow rate of clean water are provided.

  According to such a configuration, the supply temperature of clean water can be stabilized.

  Here, the liquid heating apparatus according to any one of claims 1 to 4 is provided not only with heating of the clean water flowing through the secondary flow path but also with, for example, a heated liquid existing in the storage means outside. A flow path that can be supplied to the load terminal or a flow path that can heat (repel) hot water in the bathtub by exchanging heat with the liquid in the storage means is provided independently of the primary flow path described above. It is also possible to adopt a configuration. In such a configuration, the liquid in the storage unit itself, the liquid in the storage unit, and the liquid in the storage unit, such as the operation of supplying the liquid in the storage unit or hot water heated by the liquid to a thermal load such as a load terminal or a bathtub, For supplying heat energy to a heat load such as a load terminal or a bathtub provided outside through a liquid such as hot water heated by heat exchange of the heat (hereinafter referred to as a heat energy supply operation as required) Can be implemented.

  On the other hand, the liquid heating apparatus according to any one of claims 1 to 4 can heat clean water by supplying liquid from the storage means to the heat exchange means. In other words, the liquid heating device according to any one of claims 1 to 4 is an operation of supplying the outside water without heating by stopping the supply of the liquid from the storage unit to the heat exchange unit (hereinafter referred to as necessary). (Referred to as non-heating supply operation). Therefore, the liquid heating device according to any one of claims 1 to 4 has a configuration in which a thermal load system capable of supplying thermal energy applied via the liquid in the reservoir to an external thermal load is provided, By adopting a configuration in which the energy supply operation and the non-heating supply operation can be performed at the same time, it is assumed that the use of clean water and the use of heat load can be performed simultaneously, and the usability is further improved.

  In view of this, the invention according to claim 5 provided based on such knowledge provides heat energy to external heat via the liquid in the storage means and / or the liquid heated by heat exchange with the liquid in the storage means. A heat load system capable of supplying a load, and a primary flow path is provided independently for the heat load system, and heat exchange with the liquid in the storage means and / or the liquid in the storage means In the state where the supply of heat from the storage means to the heat exchanging means is stopped and the heat energy supply operation for supplying heat energy to the external heat load via the liquid heated by the It is possible to perform a non-heating supply operation for supplying supplied water to the outside of the heating system through a heat exchanging means, and to be able to simultaneously perform a heat energy supply operation and a non-heating supply operation. Claims characterized by A liquid heating apparatus according to any one to 4 of.

  In the liquid heating apparatus of the present invention, the primary flow path through which the liquid used for heating the clean water flows is independent of the heat load system, and the liquid supply to the heat exchange means and the liquid supply to the heat load Can be performed independently. Therefore, according to the above-described configuration, the heat energy supply operation and the non-heating supply operation can be performed at the same time, and a liquid heating apparatus excellent in usability can be provided.

  Here, in the liquid heating device according to the first to fifth aspects, the heat exchange means is disposed outside the storage means, and the water is heated using the heat exchange means. It is also possible to adopt a configuration in which the liquid used for the application can be heated. In this case, the liquid heating apparatus according to any one of claims 1 to 5 is a liquid-liquid heat exchange capable of heating the liquid by heat exchange with the liquid stored in the storage means inside the storage means. It is possible to adopt a configuration in which means are provided.

  According to this configuration, in addition to heating the clean water, it is possible to heat the liquid to be supplied to other load terminals represented by a heating device or the like. Therefore, according to the present invention, it is possible to provide a liquid heating apparatus that can be used not only for supply of clean water as represented by hot water supply but also for other uses.

  According to the present invention, the heat exchange means for heating the clean water is disposed outside the storage means, and even if the liquid in the storage means performs the clean water supply operation under a low temperature condition, It is possible to provide a liquid heating apparatus that has a short time lag from the start of the water supply operation until the temperature of the clean water reaches a predetermined temperature, and has little energy loss.

  Next, a liquid heating apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, 1 is the liquid heating apparatus of this embodiment. As shown in FIGS. 1 and 2, the liquid heating apparatus 1 includes a water supply system X and a heating system Y, which will be described later, in addition to a main body 2, a combustion unit 3, and a silencer 4 inside a metal housing W. In addition, the constituent members of the bath system Z are incorporated, and the heating system H is formed by these.

  The main body 2 is largely divided into a combustion space portion 5 and a storage portion 6 (storage means). The combustion unit 3 and the combustion space unit 5 function as a heating unit 7 that heats the heat medium stored in the storage unit 6. The main body 2 is cylindrical in shape and has a double structure. A reservoir 6 is formed inside the main body 2. More specifically, the main body 2 has an outer cylinder 8 and an inner cylinder 9, and has a structure capable of storing a heat medium therein. In particular, a heat medium chamber 12 surrounded by an upper end plate 10 and a lower end plate 11 is formed in the upper half of the main body 2.

  A plurality of combustion gas passages 13 are formed in the heat medium chamber 12. The combustion gas passage 13 is a through hole that penetrates the heat medium chamber 12 of the storage unit 6 in the axial direction. The combustion unit 3 includes a burner that burns liquid fuel such as kerosene, and a fuel injection nozzle 15 is built therein. The combustion unit 3 includes a blower 16 and is connected to the combustion space 5 located below the main body 2. The combustion space part 5 functions as a combustion chamber of the combustion part 3.

  On the other hand, a silencer 4 is provided above the main body 2. The silencer 4 has a cylindrical or rectangular parallelepiped appearance and has a labyrinth structure inside to reduce combustion noise. 1 and 2, the labyrinth structure of the silencer 4 is not shown and is omitted.

  The fuel injected from the fuel injection nozzle 15 of the combustion section 3 burns in the combustion space section 5 and generates high-temperature combustion gas and flame. The combustion gas flows through the combustion gas passage 13 in the heat medium chamber 12, passes through the silencer 4, and is then discharged to the outside. The heat medium in the heat medium chamber 12 is heated by the high-temperature combustion gas flowing through the combustion gas passage 13 to increase the temperature.

  The storage unit 6 can store antifreeze as a heat medium. The storage unit 6 is provided with a temperature sensor 24 (temperature detection means) for measuring the temperature of the heat medium stored inside. The temperature sensor 24 is composed of a thermistor. In the present embodiment, the temperature sensor 24 may be provided at any location in the storage unit 6, but it is desirable that the temperature sensor 24 be attached to the upper side of the storage unit 6 in order to obtain stable detection accuracy. The combustion unit 3 is driven based on the temperature detected by the temperature sensor 24, and the heat medium in the storage unit 6 is maintained at a temperature that does not boil. More specifically, the heat medium in the storage unit 6 is normally maintained at 80 ° C. or higher, and more preferably maintained at a high temperature of 85 ° C. or higher.

  In the storage unit 6, the water supply primary side forward flow path 20 (primary flow path) and the water supply primary side return flow path 21 (primary flow path) that constitute the water supply system X, and the heating forward that constitutes the heating system Y are provided. The flow path 22 and the heating return flow path 23 are connected. In addition, a coiled heat exchanger 17 (liquid-liquid heat exchanging means) is built in the storage unit 6, and a bath going-out flow path 25 and a bath return flow path 26 constituting the bath system Z are provided therein. Is connected.

  As shown in FIG. 1, the water supply system X is configured around a water heat exchanger 30 (heat exchanging means), and the water supply primary side forward flow path 20 and the water supply primary return side are included therein. The flow path 21 and other flow paths are connected to each other. The water heat exchanger 30 is configured by a so-called plate-type heat exchanger, and includes primary side connection ports 30a and 30b and secondary side connection ports 30c and 30d. The water heat exchanger 30 communicates between the primary side connection ports 30a and 30b and between the secondary side connection ports 30c and 30d, and the liquid flowing between the primary side connection ports 30a and 30b and the secondary side The liquid flowing between the side connection ports 30c and 30d can be heat-exchanged. The water heat exchanger 30 is provided with a large number of fins therein, and the heat exchange efficiency can be appropriately adjusted by adjusting the number of fins.

  In FIG. 1, the water heat exchanger 30 is illustrated at a position adjacent to the storage unit 6 for convenience of illustration, but is actually inside the housing W and separated from the storage unit 6 as illustrated in FIG. 2. It is provided at the position. More specifically, the water heat exchanger 30 is disposed below the main body 2 including the reservoir 6. Therefore, the liquid heating apparatus 1 has a configuration in which heat transfer from the upper end side of the storage unit 6 to the upper water primary side outgoing flow path 20, the upper water primary side return flow path 21, the upper water heat exchanger 30, and the like hardly occurs. It has become.

  The water supply primary side outgoing flow path 20 and the water supply primary side return flow path 21 connected to the storage unit 6 are respectively connected to the primary side connection ports 30 a and 30 b of the water supply heat exchanger 30. In addition, a water heating pump 32 (pressure feeding means) is provided in the middle of the water primary return flow path 21. Therefore, by operating the water heating pump 32, the heat medium stored in the storage unit 6 is supplied to the water via the water primary side forward flow path 20 connected to the upper end side of the storage unit 6. It can supply to the heat exchanger 30 and can return to the storage part 6 side. That is, by operating the water heating pump 32, a circulating flow of the heat medium is generated between the storage unit 6 and the water heat exchanger 30, and the heat energy of the heat medium is exchanged for the water. Can be supplied to the vessel 30.

  A water supply flow path 33 (secondary flow path) is connected to the secondary side connection port 30c of the water heat exchanger 30, and a water supply secondary side flow path 34 ( Secondary flow path) is connected. The water supply flow path 33 is a flow path for supplying hot water (clean water) from an external water supply source to the liquid heating apparatus 1. A water amount sensor 36, a water temperature sensor 37, and a water supply expansion tank 38 are provided in the middle. Yes. A check valve 29 is provided upstream of the water amount sensor 36. Therefore, even if the primary side (the heat medium side) and the secondary side (the hot water side) communicate with each other due to internal destruction of the water heat exchanger 30, the heat medium is not shown upstream of the water (not shown). There is no backflow. The water supply channel 33 is branched into the branch channel 40 in the middle. The branch channel 40 is connected to a water quantity servo 41 (mixing means) described later.

  The water secondary side outgoing flow path 34 is a flow path through which hot water heated and exchanged in the water heat exchanger 30 flows, and is connected to the water amount servo 41. A can body thermistor 39 is provided in the middle of the water secondary side outgoing flow path 34, and is heated in the water heat exchanger 30, thereby causing hot water present in the water secondary side outgoing flow path 34. Temperature can be detected.

  The water amount servo 41 has three connection portions 41a, 41b, and 41c, and is configured to be able to mix hot water (liquid) that has flowed in from the connection portions 41a and 41b and discharge it from the connection portion 41c. The water amount servo 41 is configured to be able to adjust the opening degree of the connecting portions 41a and 41b, that is, the amount of hot water that can flow in from the connecting portions 41a and 41b, thereby mixing hot water flowing in from the connecting portions 41a and 41b. The ratio can be adjusted. The opening degree of the connecting portions 41a and 41b of the water quantity servo 41 is determined based on the set temperature of hot water to be supplied, the temperature of hot water supplied from an external water supply source via the branch flow path 40 (incoming water temperature), and the like. It is adjusted according to the amount of hot water.

  A branch channel 40 branched from the water supply channel 33 is connected to the connection part 41 b of the water amount servo 41. Therefore, in the liquid heating apparatus 1, low-temperature hot water supplied via the branch flow path 40 and high-temperature hot water supplied via the clean water secondary side outgoing flow path 34 are mixed by the water amount servo 41. It is set as the structure which can discharge | emit from the connection part 41c.

  The water amount servo 41 is in a state where the connecting portion 41a to which the water supply secondary side outgoing flow path 34 is connected is somewhat opened during a hot water supply operation or a dropping operation described later. That is, during the hot water supply operation standby, the water amount servo 41 is maintained in an open state with respect to the water supply secondary-side forward flow path 34.

  A water flow path 35 is connected to the water quantity servo 41. The upper water flow path 35 is a flow path for supplying hot water used for hot water supply or dropping into the bathtub 60. The water flow path 35 is connected to the connection part 41 c of the water quantity servo 41 and has a water quantity adjustment valve 43 (flow rate adjustment means) and a tapping temperature sensor 45 in the middle. A hot water supply connection port 46 for connecting a pipe 48 connected to a hot water tap 47 is provided at the end of the water supply channel 35.

  The water supply channel 35 is branched into the pouring bypass channel 50 at a position downstream of the hot water temperature sensor 45 in the hot water flow direction. The pouring bypass channel 50 is connected to a bath return channel 26 described later. The pouring bypass channel 50 is a channel for supplying hot water for dropping into the bathtub 60, and includes a pouring electromagnetic valve 51, a pouring water amount sensor 52, and check valves 53 and 54 in the middle. It has been. The pouring water amount sensor 52 detects the amount of water flowing through the pouring bypass channel 50. The hot water solenoid valve 51 is opened and closed based on a control signal for dropping operation (hot water operation, additional hot water operation, additional water operation) into the bathtub 60 that is input to the control means 90 described later. The check valves 53 and 54 are provided to prevent the hot water from flowing backward from the bathtub 60 side.

  As shown in FIG. 1, the heating system Y includes a heating forward flow path 22 connected to the storage unit 6 and a heating return flow path 23. The heating forward flow path 22 is connected to the top side of the storage section 6, and the heating return flow path 23 is connected to a position on the bottom side of the storage section 6. A heating tank 65 and a circulation pump 66 are provided in the middle of the heating return flow path 23. Heating connection ports 67 and 68 are provided at the ends of the heating forward flow path 22 and the heating return flow path 23, and pipes 69 and 70 connected to a load terminal 75 provided outside the liquid heating apparatus 1 are connected thereto. By connecting, the heat medium stored in the storage part 6 can be made to come and go between the load terminal 75 and the liquid heating device 1.

  The heating tank 65 is provided with an air vent valve 71 for discharging the air present in the heating system Y to the outside. A bypass flow path 72 is connected to the heating tank 65. The bypass flow path 72 is a flow path provided mainly for the purpose of protecting the circulation pump 66, and is attached so as to bypass the heating tank 65 and the upper end portion of the storage unit 6. The bypass channel 72 has a smaller channel cross-sectional area and a larger channel resistance than the heating return channel 23. Therefore, when the circulation pump 66 is operated in a state in which liquid can be supplied to the load terminal 75, the heat medium sucked out from the storage unit 6 through the heating forward flow path 22 flows through the pipes 69 and 70 and the load terminal 75. The flow returns to the storage unit 6 via the heating return flow path 23. On the other hand, when the circulation pump 66 is operated in a state in which liquid cannot be supplied to the load terminal 75, the heat medium is sucked out from the storage unit 6 through the bypass flow path 72, and then passed through the heating return flow path 23 to the storage unit 6. Return.

  The bath system Z is used for heating (chasing) hot water in the bathtub 60 or dropping hot water into the bathtub 60. As shown in FIG. 1, the bath system Z has a configuration in which a bath going-out flow path 25 and a bath return flow path 26 are connected to a heat exchanger 17 disposed in the storage unit 6.

  The heat exchanger 17 is arranged in the storage unit 6 and has connection ports 17 a and 17 b on the bottom side and the top side of the storage unit 6. A bath outlet channel 25 is connected to the connection port 17a provided on the bottom side of the storage unit 6, and a bath return channel 26 is connected to the connection port 17b provided on the top side. Bath connection ports 61 and 62 for connecting pipes 77 and 78 connected to the bathtub 60 are provided at the ends of the bath going-out flow path 25 and the bath return flow path 26, respectively. Further, the bath going-out flow path 25 and the bath return flow path 26 are bypassed by a bypass flow path 63.

  In the middle of the bath return channel 26, a three-way valve 80, a hot water temperature sensor 81, a water flow switch 82, a circulation pump 83, and a water level sensor 84 are provided in this order from the heat exchanger 17 side toward the upstream side in the hot water flow direction. ing. In addition, the above-described pouring bypass channel 50 is connected to a position in the middle of the bath return channel 26 and upstream of the circulation pump 83. The three-way valve 80 is provided at the connection portion between the bypass flow path 63 and the bath return flow path 26 described above, and can be opened and closed as necessary. More specifically, when the hot water previously set in the bathtub 60 is heated (repels), the port on the heat exchanger 17 side of the three-way valve 80 and the port on the circulation pump 83 side communicate with each other. Is done. As a result, the hot water can come and go between the heat exchanger 17 and the bathtub 60. On the other hand, when hot water is supplied (dropped) into the bathtub 60, the port on the heat exchanger 17 side of the three-way valve 80 is closed. As a result, hot water heated in the water heat exchanger 30 flows from the pouring bypass channel 50 side to the bath outlet channel 25 and the bath return channel 26 and is supplied to the bathtub 60 via the pipes 77 and 78. It becomes possible.

  The liquid heating apparatus 1 includes a control unit 90 and a remote controller 91 (hereinafter simply referred to as a remote controller 91). The control means 90 is composed mainly of a CPU, for example, and includes a RAM, a ROM, an I / O port, an A / D conversion circuit that converts an analog sensor signal into a digital signal, or an analog of a generated digital control signal. A configuration including a D / A conversion circuit for converting to a control signal can be employed.

  The control means 90 refers to the detection signal of the detection means such as the temperature sensor 24, the water amount sensor 36, the can body thermistor 39, or the input signal input via the remote controller 91 or the like, and the combustion unit 3 or the water heating pump 32, the pumps such as the circulation pumps 66 and 83, the water amount servo 41, the water amount adjusting valve 43, the pouring electromagnetic valve 51, the valves such as the three-way valve 80, and the like are operated. That is, the control means 90 governs the overall operation of the liquid heating device 1. The control means 90 stores various discrimination reference values, control programs, and the like used for control in the ROM in advance, and refers to the detection signals of the above-described detection means as needed by the CPU and performs processing according to the control program.

  Then, operation | movement of the liquid heating apparatus 1 of this embodiment is demonstrated. In addition to the hot water supply operation for supplying hot water heated to the hot water tap 47, the liquid heating apparatus 1 supplies the hot water supplied from the outside to the hot water tap 47 as it is without performing heat exchange heating, to the load terminal 75. One or a plurality of operation methods from a load operation for supplying thermal energy via a heat medium stored in the storage unit 6, a dropping operation for dropping hot water into the bathtub 60, and a reheating operation for heating the hot water in the bathtub 60. Can be selected and implemented. Hereinafter, the operation of the liquid heating apparatus 1 will be described for each operation method.

(Hot water operation)
When the liquid heating apparatus 1 performs the hot water supply operation, the hot water supplied from the external water supply source is exchanged with the high-temperature heat medium stored in the storage unit 6 in the water heat exchanger 30. It is heated and supplied toward the hot water tap 47. More specifically, in the liquid heating apparatus 1, when an operation switch (not shown) is turned on and the hot-water tap 47 is opened, low-temperature hot water is supplied from an external water supply source via the water supply passage 33. The When the water amount sensor 36 provided in the middle of the water supply passage 33 detects a water flow of a predetermined amount or more, the water heating pump 32 starts to operate.

  When the water heating pump 32 is activated, the high-temperature heat medium sucked out from the primary side connection port 30a provided on the top side of the reservoir 6 is heated through the water primary side outgoing flow path 20. It is supplied to the exchanger 30. The high-temperature heat medium sucked out from the reservoir 6 returns to the reservoir 6 via the clean water primary-side return flow channel 21 after releasing heat energy in the clean water heat exchanger 30. That is, when the water heating pump 32 is activated, the heat medium stored in the storage unit 6 circulates between the storage unit 6 and the water heat exchanger 30.

  Part of the low-temperature hot water supplied from the outside via the water supply channel 33 is supplied to the water heat exchanger 30, and the remaining part is supplied to the water amount servo 41 via the branch channel 40. Here, the flow rate ratio of the hot water supplied to the hot water heat exchanger 30 and the hot water flowing to the branch channel 40 is determined by the water amount servo 41 based on the set temperature of hot water required in the hot water tap 47. Adjusted.

  The hot water supplied to the water supply heat exchanger 30 via the water supply flow path 33 is exchanged with the high-temperature heat medium supplied to the water supply heat exchanger 30 via the water supply primary-side forward flow path 20. Heated by heat exchange. Hot hot water heated in the heat exchanger 30 for clean water is supplied to the water amount servo 41 via the clean water secondary-side forward flow path 34.

  The hot hot water supplied to the water amount servo 41 is mixed with the low temperature hot water supplied via the branch flow path 40 and adjusted to a predetermined temperature, and then flows into the water supply flow path 35. The hot water that has flowed into the water supply channel 35 is supplied to the hot-water tap 47 via the pipe 48 connected to the hot-water supply connection port 46 and used for hot water supply.

(Water supply operation)
The water supply operation is an operation mode in which hot water supplied from a water supply source outside the liquid heating apparatus 1 is supplied to the hot water tap 47 as it is without being subjected to heat exchange heating by the water heat exchanger 30. More specifically, when the water supply operation is performed, the liquid heating device 1 does not perform the hot water supply operation when an operation switch (not shown) is in an off state. That is, when the operation switch is in the OFF state, the water heating pump 32 does not operate, and the heat medium (heat energy) is not supplied from the reservoir 6 to the water heat exchanger 30. Therefore, when the hot-water tap 47 is opened in this state, the low-temperature hot water supplied from the external water supply source via the water supply flow path 33 passes through the water heat exchanger 30 and is supplied to the hot-water tap 47. Is done.

  The liquid heating apparatus 1 according to the present embodiment heats hot water (clean water) supplied from an external water supply source as in a load operation or a chasing operation regardless of whether the operation switch described above is in an on state. It is set as the structure which can implement the driving | operation not accompanied by. Therefore, even if the liquid heating device 1 breaks down when the circulation pump 32 is in an OFF state and the heat medium (heat energy) cannot be supplied from the storage unit 6 to the heat exchanger 30 for drinking water, Although it is impossible to carry out the hot water supply operation for supplying the hot water, the water supply operation can be carried out.

(Load operation)
When the liquid heating apparatus 1 is operated under load operation, when a load operation switch (not shown) is turned on, the combustion unit 3 starts combustion operation, and the heat medium stored in the storage unit 6 Heated. Further, the circulation pump 66 provided in the heating return flow path 23 is operated, and the heat medium in the storage unit 6 is in the circulation flow path constituted by the heating forward flow path 22, the heating return flow path 23 and the pipes 69 and 70. Circulate. Thereby, thermal energy is supplied to the load terminal 75 via a heat medium.

(Dropping operation)
The liquid heating apparatus 1 can perform a drop operation for dropping hot water into the bathtub 60 in three operation modes including a hot water filling mode, an additional hot water mode, and an additional water mode. The additional water mode is a mode for supplying hot water supplied from the outside to the bathtub 60 without heating. When the liquid heating device 1 adds and performs the drop operation in the water mode, it is not necessary to heat the hot water, so the water heating pump 32 is not operated. That is, when operating in the additional water mode, a part of the low-temperature hot water supplied from the outside passes through the water heat exchanger 30 and is supplied to the water amount servo 41 and the low-temperature water supplied from the outside. The remaining portion of the hot water flows into the water quantity servo 41 through the branch channel 40 and merges, and is dropped into the bathtub 60 through the water channel 35 and the pouring bypass channel 50.

  The hot water filling mode is a mode in which hot water supplied from the outside is heated in the water heat exchanger 30 and dropped into the bathtub 60, and hot water is filled in the bathtub 60. The additional hot water mode is a mode in which hot water heated in the water heat exchanger 30 is added to the bathtub 60 in a state where a certain amount of hot water is previously stored in the bathtub 60.

  When the liquid heating device 1 is operated in a drop-down operation in the hot water filling mode or the additional hot water mode, the low-temperature hot water supplied from the water supply source is heated in the hot water heat exchanger 30 and dropped into the bathtub 60. That is, when the drop operation is performed in the hot water filling mode or the additional hot water mode, hot water is supplied from an external water supply source. When the water amount sensor 36 provided in the middle of the water supply passage 33 detects a water amount of a predetermined amount or more, the water heating pump 32 starts to operate.

  On the other hand, when the liquid heating apparatus 1 performs the dropping operation in the hot water filling mode or the additional hot water mode, the three-way valve 80 provided in the middle of the bath return passage 26 is closed to the heat exchanger 17 side. In addition, the pouring electromagnetic valve 51 provided in the pouring bypass channel 50 which is a branch channel of the water supply channel 35 is opened. As a result, the hot water heated in the heat exchanger for clean water 30 is mixed with the low temperature hot water supplied via the branch flow path 40 in the water amount servo 41, and then the clean water flow path 35 and the pouring bypass flow path 50. Then, it flows into the bath return channel 26. A part of the hot water flowing into the bath return channel 26 flows into the pipe 78 as it is and dropped into the bathtub 60. Further, the remaining part of the hot water flowing into the bath return channel 26 flows into the bath going channel 25 via the bypass channel 63 and is dropped into the bathtub 60 via the pipe 77.

(Reaping driving)
In the reheating operation, a circulating flow of hot water is generated between the coil heat exchanger 17 provided in the storage unit 6 and the bathtub 60, and the high-temperature heat medium stored in the storage unit 6 In this mode, hot water flowing in the heat exchanger 17 is heated by heat exchange. More specifically, when the liquid heating device 1 operates in a reheating operation, the combustion unit 3 performs the combustion operation in the same manner as in each operation described above, and the heat medium in the storage unit 6 is heated. Is done. Further, when the operation is performed in the reheating operation, the port on the heat exchanger 17 side of the three-way valve 80 provided in the middle of the bath return flow path 26 and the port on the circulation pump 83 side are in communication with each other. . When the circulation pump 83 is operated in this state, hot water in the bathtub 60 is sucked out through the pipe 78 and flows into the bath return channel 26 and flows into the heat exchanger 17. The hot water flowing into the heat exchanger 17 is heated by heat exchange with the heat medium in the storage unit 6, and returned to the bathtub 60 through the bath going flow path 25 and the pipe 77. Thereby, the hot water in the bathtub 60 is gradually heated.

  The liquid heating apparatus 1 according to the present embodiment should be supplied by heating the hot water supplied from the outside of the heating system H (clean water) by the hot water heat exchanger 30 as in the hot water supply operation and the dropping operation described above. When the state is reached, the operation is performed according to the flowchart shown in FIG.

  In the control according to the flowchart shown in FIG. 3, a temperature sensor attached to the storage unit 6 when there is a command to heat and supply clean water to the liquid heating device 1 (hereinafter referred to as clean water heating request). 24, that is, the temperature of the liquid in the storage unit 6 is lower than the predetermined temperature B, the combustion unit 3 is operated to burn, and the water heating pump 32 is stopped, and the storage unit The temperature increase of the heat medium in 6 is promoted.

  Further, in the control method shown in FIG. 3, the time from when there is a request for heating water to the time when hot water is adjusted to the set temperature St and becomes ready for supply (hereinafter referred to as rise time if necessary). Control is also performed to minimize it. That is, in the control method shown in FIG. 3, when the temperature of the heat medium in the storage unit 6 reaches a temperature equal to or higher than the predetermined temperature C, even if the temperature of the normal flow rate of hot water (clean water) is low. The water heating pump 32 is activated in a state where the flow rate of hot water flowing into the water heat exchanger 30 is reduced, and the rise time is shortened. On the other hand, when the temperature of the heat medium in the storage unit 6 reaches a predetermined temperature E (E> C), the normal flow rate of hot water (clean water) is supplied to the clean water heat exchanger 30 at the set temperature St. Or since it is assumed that it can heat to the temperature close | similar to this, the flow volume restriction | limiting mentioned above is cancelled | released. Hereinafter, operation | movement of the liquid heating apparatus 1 implemented with respect to a water heating request | requirement is demonstrated in detail in order according to the flowchart shown in FIG.

  As shown in FIG. 3, the control unit 90 confirms whether or not there is a request for heating water in step 1. In the liquid heating apparatus 1 of the present embodiment, when the hot water introduced through the water supply passage 33 is heated and used as in the hot water supply operation or the dropping operation, the hot water supply 47 or the hot water solenoid valve 51 is opened. Since the water flow is generated in the water supply flow path 33, the control means 90 determines that there has been a request for heating the water on the condition that the amount of water detected by the water amount sensor 36 is equal to or greater than the predetermined minimum operating flow rate α. To do.

  When there is no request for heating water in step 1, the pump 32 for heating water is stopped (step 10), and a request for a request for heating water is issued. On the other hand, when it is confirmed in step 1 that a water heating request has been issued, the control flow proceeds to step 2. In step 2, whether or not the temperature of the hot water stored in the storage unit 6 is higher than the predetermined temperature B is confirmed by the temperature sensor 24 attached to the storage unit 6. Here, the predetermined temperature B is the hot water supplied from the outside of the heating system H to the hot water heat exchanger 30 by supplying the heat medium stored in the storage unit 6 to the hot water heat exchanger 30. Is set to a temperature that can be sufficiently heated. In the present embodiment, the predetermined temperature B is set to 80 ° C.

  In step 2, when the detected temperature Th of the temperature sensor 24 is equal to or higher than the predetermined temperature B, the heat medium in the storage unit 6 is sufficiently hot. Therefore, even if the combustion unit 3 is not operated again, the water supply flow path 33 can be obtained simply by operating the clean water heating pump 32 and circulating the heat medium between the storage unit 6 and the clean water heat exchanger 30. The hot and cold water introduced through the can be heated. Therefore, in step 2, the control flow is advanced to step 11 on condition that the detected temperature Th is equal to or higher than the predetermined temperature B, and the water heating pump 32 is turned on. Thereafter, the control flow is returned to step 1.

  On the other hand, in order to stably heat the hot water to the set temperature St in the tap water heat exchanger 30, it is desirable that the detected temperature Th of the temperature sensor 24 is equal to or higher than the predetermined temperature B. Therefore, when the detected temperature Th of the temperature sensor 24 is lower than the predetermined temperature B in step 2, the control means 90 advances the control flow to step 3 to cause the combustion unit 3 to perform a combustion operation to heat the heat medium. At this time, the water heating pump 32 is maintained in a stopped state, and the supply of the heat medium (thermal energy) to the water heat exchanger 30 is stopped.

  When the combustion operation starts in step 3, the control flow proceeds to step 4 and it is confirmed whether or not the detected temperature Th of the temperature sensor 24 is lower than the predetermined temperature E. Here, the predetermined temperature E is set lower than the predetermined temperature B described above. The predetermined temperature E is set to a temperature higher than the hot water supply set temperature St by a temperature β. In the present embodiment, the predetermined temperature E is set to a temperature (= St + 10 [° C.]) that is 10 ° C. higher than the supply set temperature St. The predetermined temperature E may be set to a constant temperature, and may be fixed at 75 ° C., for example.

  If it is confirmed in step 4 that the detected temperature Th is lower than the predetermined temperature E, the temperature of the heat medium stored in the storage unit 6 is low. Here, as described above, in the liquid heating apparatus 1 of the present embodiment, the rise time in the case where the heat medium in the storage unit 6 is at a low temperature at the time when the water heating request is issued should be minimized. When the detected temperature Th is equal to or higher than the predetermined temperature C but lower than the predetermined temperature E, the amount of hot water flowing into the water heat exchanger 30 is limited until the detected temperature Th is equal to or higher than the predetermined temperature E. .

  Therefore, in the control flow shown in FIG. 3, the detected temperature Th is confirmed in step 4. When the detected temperature Th in step 4, that is, the temperature of the heat medium in the reservoir 6 is equal to or higher than the predetermined temperature E (E> C), the hot water flowing into the water heat exchanger 30 as described above. Even without restricting the flow rate, it is assumed that the hot water supplied to the water heat exchanger 30 can be heated to the set temperature St or a temperature close thereto. Therefore, when the detected temperature Th is equal to or higher than the predetermined temperature E in step 4, the control flow proceeds to step 12, the water heating pump 32 is turned on, and hot water heating supply is started. Thereafter, the control flow proceeds to step 13 described later.

  On the other hand, if the detected temperature Th is lower than the predetermined temperature E in step 4, it is necessary to further raise the temperature of the heat medium in order to stably heat-exchange heat the hot water in the reservoir 6. However, even if the detected temperature Th is lower than the predetermined temperature E, if the temperature reaches the temperature equal to or higher than the predetermined temperature C described above, the temperature of the heat medium in the storage unit 6 is the normal flow rate of hot water (clean water). Although the temperature is low for heating, if the amount of hot water supplied to the water heat exchanger 30 is a little smaller than the normal flow rate, it can be heated to a set temperature St or a temperature close thereto. is assumed. Therefore, when the detected temperature Th is lower than the predetermined temperature E in step 4, the control flow proceeds to step 5 and step 6, and the water amount adjustment valve 43 performs the closing operation. As a result, the amount of hot water that can flow out to the upper water flow path 35 side (hereinafter referred to as a hot water supply flow rate if necessary) is restricted to a predetermined amount F or less.

  When the hot water supply flow rate is regulated to the predetermined amount F or less as described above, the control flow proceeds to step 7 and waits for the detected temperature Th to reach the predetermined temperature C or higher. When the detected temperature Th becomes equal to or higher than the predetermined temperature C in step 7, the control flow proceeds to step 8, and the water heating pump 32 is turned on. Thereby, the heat medium heated in the storage part 6 and having become the predetermined temperature C or higher is supplied to the water heat exchanger 30. On the other hand, as described above, the supply amount of hot water supplied from the outside to the water heat exchanger 30 is reduced as compared with the normal time and adjusted to a predetermined amount F. Therefore, when the water heating pump 32 starts to operate in step 8, the hot water can be supplied to the outside of the heating system H while being heated to the set temperature St or a temperature close thereto.

  When the water heating pump 32 starts to operate in step 8, the control flow proceeds to step 9, and the hot water supply flow rate is adjusted to the predetermined amount F until the detected temperature Th reaches the predetermined temperature E (E> C). The heating of the heat medium in the storage unit 6 is continued. When it is confirmed in step 9 that the detected temperature Th has become equal to or higher than the predetermined temperature E, the control flow proceeds to step 13.

  Here, the temperature of the heat medium in the storage unit 6 (detected temperature Th) has reached a predetermined temperature E or higher when the process proceeds to step 13, and the amount of hot water supplied to the water heat exchanger 30 is determined. Even if it returns to normal flow volume, it can be assumed that this can be heated to about set temperature St. Therefore, when the control flow shifts to step 13, the water amount adjustment valve 43 opens. As a result, the amount of hot water that can flow out to the upper water flow path 35 side (downstream of the water amount adjustment valve 43) (hereinafter referred to as hot water supply flow rate if necessary) is returned to the normal flow rate.

  When the water amount adjustment valve 43 starts to open in step 13, the control flow proceeds to step 14, and it is confirmed whether or not the temperature of the heat medium in the storage unit 6 (detected temperature Th) has reached a predetermined temperature A. The Here, the predetermined temperature A is set to a temperature at which the temperature of the heat medium is sufficiently high and hot water supplied from the outside in the water heat exchanger 30 can be heated and supplied even when the combustion operation of the combustion unit 3 is stopped. Yes. In the present embodiment, the predetermined temperature A is set to 85 ° C.

  When the detected temperature Th is lower than the predetermined temperature A in step 14, the combustion unit 3 continues to perform the combustion operation and the heating of the heat medium is continued. On the other hand, when the detected temperature Th has reached the predetermined temperature A or higher, the temperature of the heat medium has reached a temperature at which the hot and cold water can be sufficiently heated up to the set temperature St. There is no need to heat. Therefore, when the detected temperature Th is equal to or higher than the predetermined temperature A in step 14, the control flow proceeds to step 15, the combustion unit 3 stops the combustion operation, and a series of control flow is completed.

  As described above, in the liquid heating apparatus 1 of the present embodiment, the temperature of the heat medium in the storage unit 6 (detected temperature Th) at the time when the water heating request is issued is lower than the predetermined temperature C. In this case, the combustion section 3 is combusted in a state in which the activation of the water heating pump 32 is delayed, and the heat medium is heated. Therefore, in the liquid heating device 1, when the heat medium in the storage unit 6 is lower than the predetermined temperature C, the supply of the heat medium to the water heat exchanger 30 is interrupted, and the heat medium is heat water heat exchange. While suppressing generation | occurrence | production of the energy loss by thermally radiating with the container 30, the temperature rising of the thermal medium in the storage part 6 can be accelerated | stimulated. Therefore, the liquid heating apparatus 1 can minimize the time lag and energy loss until the hot water can be supplied at the predetermined set temperature St after the start of the water supply operation.

  The liquid heating device 1 described above is configured to turn on or off the water heating pump 32 in accordance with the temperature of the heat medium in the storage unit 6, and thus operates by receiving power supply from an AC power source, for example. A so-called AC pump can be employed.

  The liquid heating apparatus 1 of the present embodiment is for turning the water heating pump 32 on or off based on the temperature of the heat medium, but the present invention is not limited to this, for example, As the water heating pump 32, a pump capable of adjusting the liquid pumping capability such as a so-called DC pump that operates by receiving electric power from a direct current power supply is adopted, and the water is supplied according to the temperature of the heat medium (detection temperature Th). It is good also as a structure which adjusts the pumping capability of the pump 32 for a heating. More specifically, when the temperature of the liquid heating device 1 is lower than the predetermined temperature C, the liquid heating device 1 becomes lower than the pumping ability in a steady state (in the present embodiment, a state where the detected temperature Th is equal to or higher than the predetermined temperature E). It is good also as a structure adjusted as follows. Also in the case of such a configuration, as in the case of the above-described embodiment, the time lag and energy loss until the hot water can be supplied at the predetermined set temperature St after the start of the water supply operation are minimized. be able to.

  As described above, in the liquid heating apparatus 1, the water heat exchanger 30 for heating the hot water (water supply) used for the hot water supply operation and the dropping operation is disposed at a position away from the storage unit 6. . Therefore, the liquid heating device 1 has a smaller capacity and a lower height than the liquid heating device of the prior art. Therefore, the liquid heating apparatus 1 has a compact apparatus configuration.

  The liquid heating device 1 circulates a heat medium stored in the storage unit 6 between the storage unit 6 and the water heat exchanger 30 and heats hot water by heat exchange with the heat medium. Has been. Therefore, the liquid heating apparatus 1 has high heating efficiency of hot water.

  In the liquid heating apparatus 1, the heat medium supplied to the water heat exchanger 30 for heating hot water is a part of the heat medium stored in the storage unit 6. Therefore, the liquid heating apparatus 1 is in the middle stage of heating of the heat medium stored in the storage unit 6, even if the heat medium existing in the storage unit 6 has temperature unevenness due to the influence of convection or the like. The supply temperature of hot water can be stabilized almost without being influenced by the temperature. Therefore, in the liquid heating apparatus 1 of the present embodiment, the temperature of hot water supplied (discharged) via the hot water tap 47 during the hot water supply operation and the temperature of hot water dropped into the bathtub 60 during the drop operation are started. After that, the period required to stabilize at the set temperature St is short.

  The liquid heating apparatus 1 can heat clean water to a desired temperature if the heat medium supplied to the clean water heat exchanger 30 reaches a predetermined temperature. Here, in the liquid heating apparatus 1 of this embodiment, since the combustion part 3 can heat the heat medium in the storage part 6 from the downward direction of the storage part 6, the combustion part 3 is burned and the storage part 6 is operated. When the inner heat medium is heated, the heat medium causes convection, and the heat medium on the upper side of the storage section 6 tends to be hotter than the heat medium on the lower side. Moreover, in the liquid heating apparatus 1 of this embodiment, it is set as the structure which takes out a heat medium from the upper side of the storage part 6, supplies it to the heat exchanger 30 for clean water, and returns it to the lower side of the storage part 6. FIG. Therefore, the liquid heating apparatus 1 is preferentially supplied to the water heat exchanger 30 with a high-temperature heat medium existing in the storage unit 6. Therefore, the liquid heating apparatus 1 has a short time (rise time) required for heating and supplying hot water to the set temperature St after a request for heating water is supplied.

  Moreover, in the liquid heating apparatus 1 of this embodiment, the heat medium which exists in the upper part side of the storage part 6 becomes high temperature rather than what exists in the lower part side by the influence of a convection etc. as mentioned above, and hot water supply operation and dropping operation are carried out. In order to prevent the hot water heat exchanger 30 and the hot water and the heat medium staying in the vicinity thereof from becoming excessively hot when the hot water heat exchanger 30 is stopped, Is arranged. Therefore, the liquid heating apparatus 1 is unlikely to generate so-called high temperature hot water, in which unexpectedly hot water is supplied immediately after the start of the hot water supply operation or the dropping operation.

  In the liquid heating apparatus 1 of the present embodiment, the water amount adjustment valve 43 performs the closing operation on the condition that the detected temperature Th is equal to or higher than the predetermined temperature C and lower than the predetermined temperature E, and the water supply passage 33 (secondary The flow rate of hot water that can be supplied to the hot water heat exchanger 30 via the flow path) is higher than the flow rate of hot water supplied to the hot water heat exchanger 30 when the detected temperature Th is equal to or higher than the predetermined temperature E. It is adjusted to be a small amount (predetermined amount F). Therefore, the liquid heating apparatus 1 can supply hot water to the set temperature St or a temperature of about this level without waiting until the temperature of the heat medium becomes equal to or higher than the predetermined temperature E.

  In the above embodiment, hot water supplied to the water heat exchanger 30 by narrowing the opening of the water amount adjusting valve 43 on condition that the detected temperature Th is equal to or higher than the predetermined temperature C and lower than the predetermined temperature E. However, the present invention is not limited to this, and the water amount servo 41 to which the water supply secondary-side forward flow path 34 is connected is exemplified. It is good also as a structure which restrict | squeezes the opening degree of the connection part 41a.

  In the above-described embodiment, the flow rate of hot water that can be supplied to the water heat exchanger 30 via the water supply channel 33 on condition that the detected temperature Th is not lower than the predetermined temperature E but is equal to or higher than the predetermined temperature C. In the above example, the water heating pump 32 is operated to supply the heat medium to the water heat exchanger 30 and heat exchange heating is performed, but the present invention is not limited to this. That is, the liquid heating apparatus 1 does not limit the flow rate of hot water as described above, for example, and stops the water heating pump 32 until the detected temperature Th reaches the predetermined temperature E, and becomes equal to or higher than the predetermined temperature E. In this case, the water supply heating pump 32 is activated to supply the heat medium to the water supply heat exchanger 30, and a normal flow rate of hot water is supplied to the water supply heat exchanger 30 for heat exchange heating. Good.

  In the liquid heating apparatus 1 of the present embodiment, a configuration in which constituent members and pipes of the water system X, the heating system Y, and the bath system Z are accommodated in addition to the storage unit 6, the heating means 7, the water exchanger 30, and the like. It is said that. Therefore, the liquid heating apparatus 1 has little heat energy loss due to heat dissipation due to the passage of the heat medium between the storage unit 6 and the water heat exchanger 30 and heat dissipation due to heat dissipation in the water heat exchanger 30.

  Since the liquid heating apparatus 1 employs a plate-type heat exchanger as the water heat exchanger 30, a desired heat exchange efficiency can be obtained without enlarging the water heat exchanger 30. it can. Therefore, the liquid heating apparatus 1 has a small space required for installing the water heat exchanger 30 in the housing W, and the overall apparatus configuration is compact.

  In the said embodiment, although the example which employ | adopted what is called a plate-type heat exchanger as the heat exchanger 30 for clean water was illustrated, this invention is not limited to this, Other types of heat exchangers are used. It may be adopted.

  As described above, the liquid heating apparatus 1 is provided with the water heating pump 32 in the middle of the water primary return flow path 21, and operates this to operate between the water heat exchanger 30 and the storage unit 6. Thus, the heat medium can be circulated. Therefore, the liquid heating apparatus 1 can control the heating state of the clean water used for hot water supply or dropping by controlling the operation of the clean water heating pump 32.

  The liquid heating apparatus 1 has a water amount servo 41, and after supplying hot water heated in the hot water heat exchanger 30 and low temperature hot water supplied from the outside to the water heating device 41 and mixing them, Via the hot water tap 47, hot water can be supplied. Further, the liquid heating apparatus 1 is provided with a water amount adjustment valve 43 in the middle of the upper water flow path 35. Therefore, in the liquid heating apparatus 1 of the present embodiment, heat dissipation or the like occurs in the middle of the clean water primary-side forward flow path 20, the clean water primary-side return flow path 21, the clean water secondary-side forward flow path 34, or the like. However, it is possible to accurately adjust the temperature of clean water supplied for hot water supply or dropping.

  Further, since the liquid heating device 1 is provided with the water amount servo 41 and the water amount adjusting valve 43, the set temperature St of the hot water supply is suddenly changed by the operation of the remote controller 91 during the hot water supply operation, or the operation of the hot water tap 47 is performed. Thus, even if the hot water (water supply) supply conditions are changed abruptly, such as when the hot water supply flow rate is changed abruptly, the hot water supply operation can be performed at a stable hot water temperature.

  In the said embodiment, although the structure which stabilizes the supply temperature of clean water by providing the water quantity servo 41 and the water quantity adjustment valve 43 was illustrated, this invention is not limited to this, The water quantity servo 41 and the water quantity The configuration may be such that either one or both of the regulating valves 43 are not provided.

  As described above, the liquid heating apparatus 1 arranges the water heat exchanger 30 outside the storage unit 6 and supplies the heat medium in the storage unit 6 to the load terminal 75 or in the storage unit 6. It is set as the structure which can replenish the hot water in the bathtub 60 by heat-exchange heating in the arranged heat exchanger 17. FIG. Therefore, in the liquid heating apparatus 1, the thermal energy stored in the storage unit 6 via the heat medium can be effectively used for the use of the load terminal 75 and the reheating of hot water in the bathtub 60.

  Moreover, the liquid heating apparatus 1 of this embodiment operates the circulating pump 32 and supplies the heat medium in the storage part 6 to the hot water heat exchanger 30, thereby supplying hot water (upper water) used for hot water supply or dropping. Water) can be heat exchange heated. Conversely, the hot water supplied from outside is supplied to the water heat exchanger 30 by stopping the supply of the heat medium in the reservoir 6 to the water heat exchanger 30 with the circulation pump 32 stopped. It can be passed through and supplied in an unheated state. For this reason, the liquid heating device 1 can be used in a load operation or a reheating operation, a water supply operation in which hot water supplied from outside the heating system H is supplied in an unheated state, or an additional water mode if the circulation pump 32 is stopped. Can be performed in parallel with the drop-in operation. Moreover, the liquid heating apparatus 1 can perform the load operation and the reheating operation, and the water supply operation and the dropping operation in the additional water mode in parallel even when the circulation pump 32 cannot be operated due to a failure or the like. it can.

  As described above, the liquid heating apparatus 1 can supply the clean water supplied from the outside in a non-heated state (water supply operation, dropping operation in the additional water mode) by stopping the circulation pump 32. it can. Therefore, if the liquid heating device 1 is configured to be able to supply hot water preheated (heated) outside the heating system H by a heating device such as a so-called solar water heater, to the water heat exchanger 30, Even when the circulation pump 32 is not operated or the circulation pump 32 cannot be operated due to a failure or the like, heated hot water can be supplied to the hot-water tap 47 and the bathtub 60.

  Although the above-mentioned liquid heating apparatus 1 illustrated the structure which has arrange | positioned the heat exchanger 17 used in order to chase the hot water in the bathtub 60 inside the storage part 6, this invention is not limited to this. There may be a configuration without the heat exchanger 17. According to this configuration, the capacity of the storage unit 6 can be further reduced, the height of the storage unit 6 can be reduced, and the liquid heating apparatus 1 can be reduced in size.

  Moreover, although the liquid heating apparatus 1 employ | adopted the coil type heat exchanger as the heat exchanger 17 for reheating, and this was arrange | positioned in the storage part 6, this invention is limited to this. For example, as in the case of the heat exchanger 30 for drinking water, a separate heat exchanger is provided outside the storage unit 6, and the heat medium in the storage unit 6 is supplied to the heat exchanger to thereby follow the hot water in the bathtub 60. It is good also as a structure which can be sprinkled.

  In addition, also when it is set as the structure which arrange | positions the heat exchanger for reheating outside the storage part 6, the quantity of heat medium required in order to supply a thermal energy to the load terminal 75 is stored in the storage part 6. It is necessary to have a structure that can be heated. Therefore, when the capacity of the storage unit 6 is the minimum necessary size for heating the heat medium supplied to the load terminal 75, a reheating heat exchanger is provided outside the storage unit 6. It is assumed that the contribution to the compactness of the apparatus configuration of the liquid heating apparatus 1 is small. Therefore, the liquid heating apparatus 1 sets the capacity of the storage unit 6 as the minimum necessary for heating the heat medium supplied to the load terminal 75 as described above, and the reheating heat exchanger 17 is stored in the storage unit. By adopting a configuration accommodated in the interior of the apparatus 6, the apparatus configuration can be made compact.

  In the said embodiment, although the heating means 7 was distribute | arranged to the downward direction of the storage part 6, the structure which can heat the heat medium stored in the storage part 6 from the downward side of the storage part 6 was illustrated, this invention is this. For example, a so-called reverse combustion type combustion form is adopted as the heating means 7, and the heating means 7 is arranged above the storage portion 6. It is also possible to adopt a configuration in which the heat medium in the storage unit 6 can be heated from the side of the storage unit 6. Also in the case of such a configuration, the heat medium causes convection in the storage unit 6, and the heat medium existing on the upper side of the storage unit 6 is likely to be hotter than the lower side. That is, by arranging the heating means 7 below, above, or on the side of the storage unit 6, convection occurs when the storage unit 6 locally becomes hot, and there is a high possibility that a temperature distribution of the heat medium will occur. Therefore, in the case of such a configuration, if a configuration similar to that of the liquid heating device 1 described above is employed, it is possible to contribute to improvement of so-called hot water characteristics and energy saving.

  In the said embodiment, although the heating means 7 was distribute | arranged to the downward direction of the storage part 6, the structure which can heat the heat medium stored in the storage part 6 from the downward side of the storage part 6 was illustrated, this invention is this. For example, a so-called reverse combustion type combustion form is adopted as the heating means 7, and the heating means 7 is arranged above the storage portion 6. It is also possible to adopt a configuration in which the heat medium in the storage unit 6 can be heated from the side of the storage unit 6. Also in the case of such a configuration, the heat medium causes convection in the storage unit 6, and the heat medium existing on the upper side of the storage unit 6 is likely to be hotter than the lower side. That is, by arranging the heating means 7 below, above, or on the side of the storage unit 6, convection occurs when the storage unit 6 locally becomes hot, and there is a high possibility that a temperature distribution of the heat medium will occur. Therefore, in the case of such a configuration, if a configuration similar to that of the liquid heating device 1 described above is employed, it is possible to contribute to improvement of so-called hot water characteristics and energy saving.

It is an operation | movement principle figure which shows the liquid heating apparatus concerning one Embodiment of this invention. It is a front view which shows the state which fractured | ruptured a part of liquid heating apparatus shown in FIG. It is a flowchart which shows operation | movement of the liquid heating apparatus shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid heating apparatus 2 Main-body part 6 Storage part (storage means)
7 Heating means 17 Heat exchanger (liquid-liquid heat exchanging means)
20 Water supply primary flow path (primary flow path)
21 Water supply primary return channel (primary channel)
24 Temperature sensor (temperature detection means)
30 Heat exchanger for water supply (heat exchange means)
32 Water heating pump (pressure feeding means)
34 Water supply secondary flow path (secondary flow path)
35 Water flow path 41 Water quantity servo (mixing means)
43 Water volume adjustment valve (flow rate adjustment means)
90 Control means 91 Remote controller (remote controller)
W Enclosure X Water supply system Y Heating system Z Bath system H Heating system

Claims (6)

A storage unit having a casing and capable of storing the liquid in the casing; a heating unit capable of heating the liquid in the storage unit from below, above or from the side of the storage unit; a heat exchange unit; A primary flow path capable of supplying liquid stored in the storage means to the exchange means, a secondary flow path capable of circulating clean water, and a pressure feed capable of pumping liquid between the storage means and the heat exchange means And a heating system comprising a temperature detection means capable of directly or indirectly detecting the temperature of the liquid stored in the storage means,
The heat exchanging means is disposed at a position spaced downward with respect to the storage means, and supplying the clean water via the secondary flow path allows the clean water to be stored via the primary flow path. It is possible to carry out the water supply operation for supplying heat to the outside of the heating system by heat exchange with the liquid supplied from the means,
At the timing of performing the water supply operation, on the condition that the detected temperature of the temperature detecting means is lower than the first predetermined temperature, the pressure feeding means until the detected temperature of the temperature detecting means becomes equal to or higher than the first predetermined temperature A liquid heating apparatus characterized by delaying the start-up of the liquid or limiting the liquid pumping capacity of the pumping means. When it is assumed that the flow rate of clean water supplied to the heat exchange unit via the secondary channel is the reference flow rate when the temperature detected by the temperature detection unit is equal to or higher than the second predetermined temperature,
The flow rate of clean water supplied to the heat exchanging means via the secondary flow path is determined on the condition that the temperature detected by the temperature detecting means is equal to or higher than the first predetermined temperature and lower than the second predetermined temperature. The liquid heating apparatus according to claim 1, wherein the liquid heating apparatus is limited to a smaller amount than the reference flow rate.   The liquid heating apparatus according to claim 1 or 2, wherein the liquid existing above the storage means is preferentially supplied to the heat exchange means with respect to the liquid existing below.   Mixing means for mixing the clean water heated in the heat exchange means and flowing through the secondary flow path, clean water supplied from the outside of the heating system, and a flow rate adjusting means capable of adjusting the flow rate of clean water are provided. The liquid heating apparatus according to claim 1, wherein the liquid heating apparatus is a liquid heating apparatus. A heat load system capable of supplying heat energy to an external heat load via the liquid in the storage means and / or the liquid heated by heat exchange with the liquid in the storage means;
A primary flow path is provided independently for the heat load system;
A thermal energy supply operation for supplying thermal energy to an external heat load via the liquid in the storage means and / or the liquid heated by heat exchange with the liquid in the storage means;
In a state where the supply of the liquid from the storage means to the heat exchange means is stopped, the non-heating supply operation for supplying the clean water supplied through the secondary flow path to the outside of the heating system through the heat exchange means It can be implemented,
The liquid heating apparatus according to claim 1, wherein the thermal energy supply operation and the non-heating supply operation can be performed simultaneously.   6. The liquid-liquid heat exchange means capable of heating the liquid by heat exchange with the liquid stored in the storage means is provided inside the storage means. The liquid heating apparatus as described.

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